Change xtreme costumes:
Press Up, Up, Right, Left, Down, Down, Start in the main menu.
During game play, go to an Xtraction save location and
press the button next to "Skin" tab.
Unlock Beast: Finish level 1.
Unlock Colossus: Finish the Nuclear Facility level.
Unlock Cyclops: Beat Mystique.
Unlock Emma Frost: Locate Emma Frost in X Mansion after the Nuclear Facility
Unlock Gambit: Finish level 3.
Unlock Ice Man: Finish level 1.
Unlock Jean Grey: Finish level 1.
Unlock Jubilee: Finish level 2.
Unlock Nightcrawler: Finish level 2.
Unlock Psylocke: Finish the NYC Riot/Muir Island/Sewer level.
Unlock Rogue: Finish level 1.
Unlock Storm: Finish level 1.
Colussus without metal, Colussus 90's: Beat the game.
Bobby Drake, Original Iceman: Beat the game.
Street Clothes Magma: Beat the game.
Wolverine 90's, Weapon X: Beat the game.
Storm's white outfit: Beat the game.
Extra health and energy:
Fail at the Danger Room courses as many times as possible.
You will get health packs, energy packs, armor, etc.
